Improvement in sewing-machines



L'. W. L ATHRO P & W. P. DE SANNO.

' SEWING MACHINE.

2 Sheets-Sheet 1.

v Padseilted- O'ot. 27, 1863.

2 Sheets8heet 2.

L. W. LATHROP & P. DE SANNO. SEWING MACHINE.

N0. 40.446. Patented Oct. 27, 1863;

Illlllllfllllllllllllll' Z m znesses. fiwanimz UNITED. STATES PATENTOFFICE.

LEBBEUS W. LATH R01 AND WILLIAM P. DE SAN N 0, QB PHILADELPHIA,PENNSYLVANIA, ASSIGNORS TO THEMSELVES, \VM. I l. MYERS, AND JOHNMCDOWELL, JR.

IMPROVEMENT IN SEWING-MACHINES.

Specification forniingpart of Letters Patent'No. 40, 146, dated October27. 1863.

mud carried around the under spool. Theloop 4 is then liberated fromthehook, and the hook takes the next. loop round in the same way, drawingthe first loop tight.

To enable others skilled in the art to make" and use our-invention, wewill proceed to describe it'sconstruction and operation.

Referring'to the accompanying drawings,- Figure l is a side view of ourmachine. Fig. 2 is an inverted plan. Fig. 3 is a plan of the spool-caseand frame. Fig. 4 is a side view of spool-case and frame. Fig. 5 is aplan of a detachable part of the spool-case frame. Fig. (l is a frontview of the slotted and grooved cup. Fig. 7 is a side view of theslotted and grooved cup. Fig. 8 is a section through the slotted andgrooved cup. Fig. 9 is a view of the back of the slotted and grooved cupwith under take-up attached. Figs. 10 and ii are general views of theabove parts in two difl'erent positions.

A is the basc-plate of the machine. To it is fixed a stationary arm, B,the outer end of which holds the presser-foot and needle-bar, the latterbeing connected to the needle-arm and operated by thelvibrating lever(J. This part of the machine is well known, and'n'eed not be describedmore particularly. I

Beneath the base-plate runs the horizontal shaft D, giving motion to thedifferent parts of the machine. This shaft has attached to one endaslottedand grooved cup, E. (Shown more particularly in Figs. 6, 7, and8.) A book, F, is fixed permanently on the outer edge of the cup, and a.slot, G is cut throughthe cup, ex-' tending clear to the edge or rim at9', Fig. 7.

A groove is also cut round its interiorcircumference at H. (See Fig. 8.)This oup'E has also a guard, 1, running partially round its outer edgeor rim, to prevent the needle-loop catching against the needle as it(the loop) is being carried round the spool.

To the basket this cup E is fixed the under take-up, J. (See Figs. 7 and9.) It revolves with the cup, and carries at one end the pin a, which ata portion of the revolution of the said cup is sunk into-a. recess inthe cup. A't

theotherend of this lever, or under take-up,

as We call it, is another pin, j, sliding on a fixed cam, K. Aspring, l,fixed on thecup and pressing against the lever J, serves to keep the pinj in contact with the edge of the cam K. The shape of the can! isindicated by the red lines in Fig. This cam is attached firmly t0 thebase-plate in a fixed position, and does not revolve with" the cup. Asthe cup revolves the pin j is carried along the circumference of the camK, causing the pin a at its opposite end to take aposition, as shown inFig. 11, at a certain portion of its revolution.

The spool-case and frame are shown in Figs. 3,.4, and 5. The spool-caseis composed of a slotted. bar, L,.and flange M, by which it is bolted tothe frame N, and is easily detached from the frame by means of athumb-screw, m, whenever a new spool is to .be inserted. The spool isplaced on a. bar, a,- vrhich-bar is made in two parts,one part having asocket, in to which the other part slides. A spiral spring in the socketserves to press the two ends of the bar outward, and enables the bar toaccommodate itself to the centers prepared in the case to receive it.The bar L-has a slot cut through it at 0', in which the spool-caseholder 0 o o vibrates. This bar also has attached to it a small spring,Q, used to give a proper tension to the lower thread. The spoolcaseframe N has a flange, R R, round it, which fits into the circular grooveH,'Fig. '8. 'Now,

in order to insert this flange in the groove H, it is necessary to makeit in two pieces. One is shown detached iii Fig. 5. --This-piece R isfixed to the frame N by the small screw S.

The spool-case holder .0 o! 0 is shown in Fig. 10, and also an end viewof it in Fig. 2. It may he described as a vibrating-fork workmeans orthe communicating. levers '10 w w w ,fiaediu the base-plate A, and iscurved, as shown in Fig.'11 and 2.

,in the slottedgrooved cup, and that inits one side of the loop Zentering the slot G and case from turning round. As the'cup E reachesand liberating it at the samev time from the ing in the'slotted groove0"" of thespool-case. ,It is operated by The cam T on shaft 1). Thiscam-strikes the tappet V, (see Fig. 2,) and by it "gives the fork o 0' oa reciprocating rotary motion, whereby each of the points 0'. o" of theforkenters and recedes from the slot 0" alternately and holds thespool-case from'turning, and at the same time allows the loop of threadZ 'Z to pass by it and between it and the Mr L. The bar at isapieceofwire firmly The operation of the machine is best seen byreference to Figs. 1 0 and .11, and is as follows: The spool-case andframe being placed proper position on the shaft D, the cup-is rotated inthedirection of arrow or". The needle ofthe machine in passing throughthe cloth forms on its return a loop on the under side ofthe cloth,knownas the needle-loop. This loop is caught by the hook F, Fig. 10, as itrotates, and is carried round the under loop, 1),

passing behind the spool, the other side, Z, passing in front of thespool-case over the bar L. Fig. 10 shows the loop just as it enters thenotch in the spool-case holder 0 0' o". The spool-case at this instantvibrates'on its'center, the art 0" entering the slot of and the part 0leaving it and liberating the loop, to pass on, and atthe same timepreventing the spoolthe position shown in Fig. 11 the under takeup, Jcomes into operation. The cam K now causes the pin a to diverge from thecup. carrying with'it the loop'Z Z, slightly extending it,

hook F, so that the hook F may be clear or" the loop Z Z and free toenter the next needleloop and repeat the same operation over again. Theloop Z Z now comes in contact with the bar x, which, byits curved shape,tbr'owsthe'.

tiall y as described.

loop 01f the pin or, leaving it room be drawn tight to the cloth. By-thus catching the loop on hook F and carrying it to the:inside of thecup through a slot, G, behind the hook, itjis carried round thespool-case and frame without its relative position, nor the passing ofsuch loop round a spool when such loop comes in contact with the flangeof the spool-case, such devices being nsed'before'; bu A We olaim I '1.The slotted circular grooved cup E, with hook F permanently attached tothe outside surface, constructed and operating substan- 2. The undertake-up,'J, which revolves with the cup for extending the loop andliberating it from book F,construc ted and operating substantially asdescribedr 3. The reciprocating holder 0 0' 0, arranged andoperatingsubstantially as described.

4.. The com-binationof the slotted circular grooved cup E and its book F,withthe spoolcase and frame L N, the under take-up, J, and thereciprocating spool-case holder 0 o 0", the whole constructed andoperating substantially as described.

, 'LEBBEUS W. LATHROP.

WM. P. DE SANNO.

W itnesses;

EDWARD BROWN, PARK Mo FARLAND.

